kotlinlang #android

But i keep getting getTrendingList onFailure Response java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $

zone

08/27/2018, 2:10 PM

On line 11 I am getting

type inference failed not enough information fun<T: Any!> error( exception: Throwable!): Single<T!>!

Untitled.kt

Seri

08/28/2018, 6:15 PM

Just use the internal variable

itemView

to refer to the view while making changes

skennedy

08/28/2018, 11:04 PM

where did the Context.toast() extension move to? it was https://github.com/android/android-ktx/blob/master/src/main/java/androidx/core/widget/Toast.kt when it was on github, but i cant find it in ktx rc02, though it’s still referenced on https://developer.android.com/reference/kotlin/androidx/core/widget/package-summary#toast

Qracle

08/28/2018, 11:25 PM

hi can anyone help me with a kapt gradle issue with dagger?

Ramin

08/29/2018, 7:56 AM

now question is how can I run query only and only when I make sure copy operation get completed

Gilles Braun

08/29/2018, 11:22 AM

Hey guys I just encountered a weird bug(?) when using

Map.forEach

in Android. The reported exception is

java.lang.NoClassDefFoundError  com.example.packagename.AdManager$executeQueuedCalls$1

I found the solution on stackoverflow already, https://stackoverflow.com/a/51215937/7684435 My code looked like this before the fix:

grouped.forEach { type, interactions -> TODO("placeholder") }

, and the kotlin compiler chose the

Map.forEach(BiConsumer<? super K, ? super V> action)

, which uses

java.util.function.BiConsumer

which isn't available on Android < 8 Oreo. Occured with kotlin version 1.2.30, also with 1.2.61, using this gradle config:

implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

I am not sure if this would be considered a bug or not

skennedy

08/29/2018, 5:55 PM

How do I make this a compile-time error?

Jakub

08/30/2018, 10:22 AM

What would you use for a greenfield reactive app: LiveData, RxJava or Coroutines? If you would mix them, which layer would you use which?

AntoineJojo

08/30/2018, 3:43 PM

Hi! Does anyone know how to revoke a permission before a UI test? I use GrantPermissionRule to grant Location permission but once granted it stays granted and I can’t test the case when permission is not granted.

matt tighe

08/30/2018, 5:11 PM

sorry that this is slightly off-topic, but can anyone point me in the direction of a resource like this channel for android development that isn’t kotlin-centric?

muralimohan962

09/01/2018, 8:20 AM

What's wrong with my code? The recyclerview is not displaying items.

stackoverflow 6

mingkangpan

09/03/2018, 10:19 AM

implementation "org.jetbrains.kotlinx:kotlix-coroutines-android:0.22.5-eap13"

mingkangpan

09/03/2018, 10:19 AM

^failed to resolve

mingkangpan

09/03/2018, 10:33 AM

damn, now this.... I guess I shouldn't use coroutines with 1.3

mingkangpan

09/03/2018, 3:26 PM

now I get some kind of R8 error oO

builderror.txt

andreasmattsson

09/04/2018, 12:09 PM

I just attempted to upgrade my Kotlin Android project to use the "androidx" jetpack libraries rather than the old support libraries, and suddenly all my kotlin-android-extensions synthetic view properties are reporting errors in gradle build:

Unresolved reference. None of the following candidates is applicable because of receiver type mismatch

Anyone have any troubleshooting advice?

vsossella

09/04/2018, 5:33 PM

https://tech.olx.com/fast-prototypes-with-flutter-kotlin-native-d7ce5cfeb5f1

09/05/2018, 4:20 PM

It's Moshi

😅 2

😂 7

Hong

09/05/2018, 4:51 PM

Since we are talking about Gson here, I have a different question. My data class has member properties that has default values, e.g.

Copy code

data class Person(val name: String, val age: Int, val desc: String = "")

When cloud JSON (via Retrofit and Gson) comes back w/ null value for

desc

field, the resultant

Person

instance will have null value for

desc

field, instead of empty string. So the non-null field

desc

can have null value. I searched online for some solutions but they all seem hacky, anyone has any good suggestion?

👍 1

Hong

09/05/2018, 4:52 PM

Thanks Daniele! So just replace Gson w/ Moshi and call it done?

lawlorslaw

09/06/2018, 1:41 AM

im trying to set up crashlytics in my project. i went through all the intitialization steps. set up a firebase project, as well as a fabric project. linked the projects. when i go to those dashboards it shows 0 crashes. Im trying to trigger a crash like so

Crashlytics.logException(IOException())

Why doesnt this force close the app and why doesnt it show a crash in either console?

lawlorslaw

09/06/2018, 4:09 AM

The developer docs (https://firebase.google.com/docs/analytics/android/start/ ) for firebase analytics suggest getting an instance of FirebaseAnalytics in the onCreate() method of an Activity. Is this really the recommended approach or should this be in a Utils class, in the Application class, or somewhere else?

Slackbot

09/07/2018, 5:27 AM

This message was deleted.

lawlorslaw

09/07/2018, 6:19 AM

I have added the plugin

apply plugin: 'kotlin-android-extensions'

, but

bundleOf()

doesn’t resolve itself. Is there something else to set up?

Qracle

09/07/2018, 7:23 AM

if anyone is kind enough, can someone please check if i properly set up injecting a fragment into an activity with dagger2 ?

google 5

stackoverflow 1

Slackbot

09/07/2018, 7:33 AM

This message was deleted.

😶 1

👨‍✈️ 3

👎 9

👮‍♂️ 6

🚔 11

Chester

09/07/2018, 2:16 PM

Hi there I'm Chester from South Africa in a few months time I'll be presenting at a meetup here in SA, I would just like to ask what functional aspects of Kotlin should I highlight in my talk (The topic is going to be Functional Android)? Thank you

kevin.cianfarini

09/09/2018, 2:33 AM

People who have worked with

ViewPager

in combination with `RecyclerView`: did you experience weirdness with the fragment lifecycle displaying your list of items?

stackoverflow 3

ubu

09/10/2018, 10:22 AM

Hi there. Is it possible to use Kotlin Delegation in Android Application class?